Bug when re-entering a world

Whenever I rejoin any of my worlds, I start to jump up and down repeatedly. I'm not pressing the space bar and I cant move. It is like I am stuck in the block beneath me. Particularly annoying, when I am playing an adventure map that places me in adventure mode and I cannot break the block beneath me to end this stuck position

I thought that when I join a world, I just pick up where I left off.

I ended up having my character in a laggish jumping up shenanigan that prevented me from moving and finishing the adventure map.

Steps to Reproduce:
1. Play an adventure map on adventure mode.
2. Save and quit at a place where you are close to a wall and in a four high area.
3. Join again and see if you experience my problem.